Professional and Linguistic Assessments Board (PLAB) Practice Exam

What is the protein level threshold for diagnosing preeclampsia?

1. 0.5g/24hours

2. 0.3g/24hours

3. 1.0g/24hours

4. 0.2g/24hours

The correct answer is: 0.3g/24hours

The threshold for diagnosing preeclampsia is established at 0.3 grams of protein in a 24-hour urine collection. This amount indicates that there is a significant level of proteinuria, which is one of the key diagnostic criteria for preeclampsia alongside hypertension. The presence of protein in the urine suggests increased kidney permeability, and when combined with higher blood pressure measurements, it confirms the diagnosis. Preeclampsia typically occurs after the 20th week of gestation and is characterized not just by hypertension, but also by proteinuria, which can lead to serious complications if not managed properly. Monitoring protein levels is essential in pregnant patients presenting with hypertension. Levels above this threshold can be indicative of the condition, necessitating further evaluation and management. While the other options present lower thresholds, they do not meet the established standard for diagnosing preeclampsia, which could lead to either missed diagnoses or unnecessary concern. The focus on 0.3g/24 hours is crucial for accurate clinical assessment and timely intervention in managing the health of both the mother and the developing fetus.